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    • 5. 发明授权
    • Air fuel ratio control apparatus for internal combustion engine
    • 用于内燃机的空燃比控制装置
    • US5345911A
    • 1994-09-13
    • US131626
    • 1993-10-05
    • Hisashi KadowakiTakashi Arimura
    • Hisashi KadowakiTakashi Arimura
    • F02D41/04F02D41/14F02D45/00
    • F02D41/1498F02D41/2451F02D2200/1015F02D41/2441F02D41/2454
    • An apparatus capable of performing correct determination of a misfire limit without involving influence by differences between individual internal combustion engines, and thus capable of realizing highly precise lean control. During lean control, a mean deviation MD.sub..lambda.=1 of angular-velocity differences, which has been learned during the adoption of the stoichiometric air-fuel ratio (i.e., during .lambda.=1) in the relevant internal combustion engine, is subtracted from the current mean deviation MD.sub.L of angular-velocity differences occurring in the engine, so that the fuel injection amount is corrected in accordance with the resultant difference .DELTA.MD, which is attributable to an increase in the risk of misfire. Thus, the mean deviation component MD.sub..lambda.=1 which corresponds to the stoichiometric air-fuel ratio and which may differ between individual internal combustion engines, is eliminated, and only the component .DELTA.MD attributable to an increase in the risk of misfire is used to control the air-fuel ratio, thereby eliminating influence of differences between internal combustion engines to enable correct determination of a misfire limit.
    • 能够在不受各个内燃机之间的差异影响的情况下能够正确地确定失火极限的装置,从而能够实现高精度的精益控制。 在精益控制期间,在相关内燃机中采用化学计量空燃比(即在λ= 1期间)期间学习的角速度差的平均偏差MDλ= 1,从 在发动机中发生的角速度差的当前平均偏差MDL,使得燃料喷射量根据由此导致的失火风险增加导致的差ΔTATA校正。 因此,消除了对应于各个内燃机之间的理论空燃比对应的平均偏差分量MDλ= 1,并且仅使用归因于失火风险增加的分量DELTA MD 控制空燃比,从而消除内燃机之间差异的影响,从而能够正确确定失火极限。